How many positive COVID-19 tests would it take to shut down sports again?

From the moment North American sports leagues announced their plans to start or restart their season while masked and sanitized and playing before eerily empty stands, the question wasn’t if some athletes would test positive for COVID-19, but when.

The second question was how many positives tests would be too many for that team — or a league — to continue playing. One? Probably not. A player could be isolated and replaced. Two? Still not many and not enough for everything to come crashing down, because rosters were expanded to allow for the possibility of a couple of positive tests and a couple of injuries stemming from the shortened preseason.

Would three positive tests be enough? Four?

How about 13? Apparently not.